USN 15ME663

Sixth Semester B.E. Degree Examination, June/July 2019

Time: 3 hrs. Max. Marks: 80

Note: Answer any FIVE full questions, choosing ONE full question from each module.
2. Any revealing of identification, appeal to evaluator and /or equations written eg, 42+8 = 50, will be treated as malpractice.

Module-1
1 a. Mention different types of maintenance. Explain any two methods. (08 Marks)
b. List the elements of planned maintenance system. (08 Marks)

OR
Important Note : 1. On completing your answers, compulsorily draw diagonal cross lines on the remaining blank pages.

2 a. What are the features of good computerized work order system? Explain. (08 Marks)
b. Discuss the importance of lubricants in maintenance system. (08 Marks)

Module-2
3 a. Explain the concept of probability and definition of reliability. (08 Marks)
b. In the life testing of ten specimens of a mini-mixer, the time to failure for each specimen is
recorded as given in table. Calculate the mean failure rate ‘’ for T = 900 hours and the
mean time to failure for all 10 specimens:
Specimen number Time to failure (hrs) Specimen number Time to failure (hrs)
1 805 6 832
2 810 7 842
3 815 8 856
4 820 9 875
5 825 10 900
(08 Marks)

OR
4 a. Explain the following system reliability model (configuration):
(i) Series reliability model (ii) Parallel reliability model (08 Marks)
b. Calculate the reliabilities of the system shown in Fig.Q4(b).

Fig.Q4(b) (08 Marks)

Module-3
5 a. Discuss briefly the basic principles of RCM (Reliability-Centered Maintenance). (08 Marks)
b. Explain the various benefits of Reliability Centered Maintenance (RCM). (08 Marks)

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OR
6 a. Explain briefly the analytical tools of Failure Mode Effects and Criticality Analysis
(FMECA). (08 Marks)
b. List some of the failure modes of a Mechanical Systems. (08 Marks)

Module-4
7 a. Define the concept of TPM (Total Productive Maintenance) and also explain the TPM
Methodology of Working. (08 Marks)
b. Discuss the goal and implementation of TPM. (08 Marks)

OR
8 a. Explain the Overall Equipment Effectiveness (OEE) with suitable example. (08 Marks)
b. “The right works at the right time.” Discuss the above statement with the use of any one
TPM concept. (08 Marks)

Module-5
9 a. What is a condition monitoring? Enumerate and explain condition monitoring techniques.
(08 Marks)
b. Explain the methods of alignment of two shafts. (08 Marks)

OR
10 a. List the semiconductors device used in camera. Explain any two condition monitoring.
(08 Marks)
b. Briefly explain the condition monitoring of following:
i) Fibre optic technique
ii) Bearing wear (08 Marks)

*****

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